X4 CPL 58mm Circular Polarizer Filter - Schott B270 - MRC16 - Nano Coating - Weather Sealed - 25 Year Support by Breakthrough Photography

I usually go with B+W when it comes to filters but I decided to try Breakthrough after hearing about them recently and I’m sold on this brand. Everything including the packaging is top notch. The CPL filter doesn’t impart any weird hues to your image and I really like how it has the highest light transference in industry. I believe you only lose 1 stop of light vs 1.5-2 on others. As an everyday filter this is excellent. I shot a few test images this weekend and on my a7CR there is no visible sharpness impact and colors and contrast look incredible. Will be ordering their ND as well next.

This is a very well-made circular polarizer, covered by a 25-year manufacturer's warranty if you register it online. I've already played with it some, and it functions flawlessly. The markings on the frame make it easy to go from horizontal to vertical framing and quickly switch the filter to the same setting. Maybe someday they'll come out with filters with built-in nanite robots that will automatically adjust the orientation for you, but for now, it is still manual. I would highly recommend any of Breakthrough Photography filters.

Great polarizer!(For those who thinks it doesn’t work, it doesn’t reduce light as much as cheaper ones, so it *appears* to be “not working”. Try standing in front of a mirror with the polarizer and flip it around a few times and you will see in the mirror that it is blocking light just fine.)Like other polarizers, it is quite thin, and not trivial to get back off your lens unless you use a rubber band around it to get a good grip. Before you say it, yes, I agree, they should provide that with the filter (and probably with GND filters too).Check the results with and without the polarizer in water, sun at a cross-angle to you, snow, and so on. You will be very pleased with the results!

So this is a 2 for 1 filter its a circular polarization and a true ND 6 stop filter so no more stacking filters or having filters stick together or not working right ..so for the price i think its justify i used it on a tamron 10-24mm wide angle lens with no issue.. you can do what i did buy it try it for a week then see if it worth it or send it back and get your money back .. and i ended up keeping it... Now they are markings or symbols around this filter beside the normal triangle mark this is a guide for you so when you are using this horizontal and turn the polarizer to get the effect you wont look at one of the marks.. just incase you wont to shoot vertical or move to another spot to reframed your shoot you can use this to get the filter back to that spot that you had it before

TL;DR: X4 if you have the money or NEED the best. Gobe if you're willing to correct white balance in post.After recently deciding to buy a CPL for my camera, I whittled the available options down to two -- Gobe 3 Peak (Schott), and Breakthrough Photography X4.On paper, the Gobe has the same specifications as the X4: Schott B270 Glass and 16 layers of coating.The X4 boasts that it's coatings are unlike any other, and that it is able to capture the highest level of sharpness while maintaining perfectly neutral colors. Many comparisons have shown that the X4 is top dog against all the major players. However, I could not find a direct comparison against Gobe and hence decided to give both of them a shot myself.Sharpness: I could not find any significant difference in sharpness between the Gobe and the X4. They are both spot on and do not appear to affect sharpness in the least.Colors: The Gobe definitely shoots "warmer" than the X4. The X4 comes out neutral as advertised. If you seeking out-of-camera accuracy, the X4 wins hands down. However, the Gobe is only SLIGHTLY off, and it can be corrected in a single Spot White Balance click in your post processor of choice. Since most serious photographs will do some amount of post processing anyway, this is not a huge deal. I don't think the average amateur would even notice the difference without a side by side comparison, anyway.Polarization: Both filters were very effective in removing glare in my tests. I could not find a significant difference between the two.Production quality: Both filters are quality products, but the X4 wins here again. The grip portion of the X4 sticks out much further and it easier to screw on and off as a result. The Gobe is much more likely to get stuck on a lens with its design.Extras: The packaging of the X4 was surprisingly hard to open and seems that they tried too hard to make it seem "nice". The amount of jostling that it took to separate the box parts was excessive considering that there is a $160 piece of glass inside it. Gobe on the other hand uses modest packaging and also plants trees with the money they make from their products.Final opinion: The X4 is the better product but, for me, it is not worth the extra $100 that I could instead spend on adding ND filters to my collection. If money is no object or you demand the best, get the X4. If you don't mind a touch of white balance correction and a slightly lesser product in general, get the Gobe.I have included some pictures of my tests. In all pictures, the order is: No filter, Gobe, X4. The car is demonstrating the polarization, and the text is a 100% crop to compare the sharpness.